All Articles
Determining the Amount of Gold in a Quartz Specimen
November 2004 by Chris Ralph
Many prospectors who find specimens of rich quartz with visible gold often wonder about the gold content of their specimens. Pieces with significant visible gold can sometimes be found at hard rock mines, by prospecting...
Gold Detecting Strategies for Hydraulic Mines and Debris Flows
The old timers typically washed these areas down to bedrock, and some areas appear terraced. I would imagine this is because these hydraulic mines were generally where the miners found old Tertiary river channels on the sides of mountains that were gold-bearing.
ICMJ's Annual Index
All About Minerals
There are several common ways that new mineral crystals form and grow. Perhaps the simplest is when minerals form through the cooling of molten rock and the atoms bond together into mineral crystals.
Picks & Pans: Exploring Wyoming's High Desert
In an untamed and lonely part of Wyoming’s high desert sits a deposit of gold so large, and so vast, that even today its volume remains a mystery. With an aerial extent of over 10 square miles and a depth of nearly 7,000 feet...
California State Gold Panning Championships
This was a tough task and it required really fast speed and perfect gold recovery, with 210 gold panners competing to advance.
The Birimian Greenstone Belts of West Africa
A few years ago I had a tremendous opportunity to visit Australia and hunt for gold there. The geology of the gold deposits there was somewhat different from what I was used to here in the US. I learned a lot about greenstone belt gold deposits while prospecting them in person, and it was an amazing trip.
Greenstone
Greenstone is a hard, tough, altered igneous rock, usually dark green in color. The term “greenstone” has been loosely applied to all greenish rock, including peridotite, dunite, jade, serpentine, and even hydro thermally altered rocks in mining districts. True greenstone is...
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